What causes war? How can military conflicts best be prevented? A prominent political scientist here addresses these questions, offering ideas that will be widely debated.Stephen Van Evera frames five conditions that increase the risk of interstate war: false optimism about the likely outcome of a war, a first-strike advantage, fluctuation in the relative power of states, circumstances that allow nations to parlay one conquest into another, and circumstances that make conquest easy....

Stephen Van Evera greeted new graduate students at MIT with a commonsense introduction to qualitative methods in the social sciences. His helpful hints, always warmly received, grew from a handful of memos to an underground classic primer. That primer evolved into a book of how-to information about graduate study, which is essential reading for graduate students and undergraduates in political science, sociology, anthropology, economics, and history - and for their advisers.